[Payments] Record CanMakePayment metrics on Desktop.

components/payments/core/autofill_payment_instrument_unittest.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/payments/core/autofill_payment_instrument.h"
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_profile.h"
@@ skipping 107 matching lines @@
     return &address_normalizer_;
   }
 
   void CompleteFullCardRequest() {
     full_card_result_delegate_->OnFullCardRequestSucceeded(
         full_card_request_card_, base::ASCIIToUTF16("123"));
   }
 
   autofill::RegionDataLoader* GetRegionDataLoader() override { return nullptr; }
 
+  ukm::UkmService* GetUkmService() override { return nullptr; }
+
  private:
   std::string locale_;
   const GURL last_committed_url_;
   FakeAddressNormalizer address_normalizer_;
 
   autofill::CreditCard full_card_request_card_;
   base::WeakPtr<autofill::payments::FullCardRequest::ResultDelegate>
       full_card_result_delegate_;
   DISALLOW_COPY_AND_ASSIGN(FakePaymentRequestDelegate);
 };
@@ skipping 187 matching lines @@
   delegate.CompleteFullCardRequest();
   EXPECT_FALSE(instrument_delegate.WasOnInstrumentDetailsReadyCalled());
   EXPECT_FALSE(instrument_delegate.WasOnInstrumentDetailsErrorCalled());
 
   delegate.GetTestAddressNormalizer()->CompleteAddressNormalization();
   EXPECT_TRUE(instrument_delegate.WasOnInstrumentDetailsReadyCalled());
   EXPECT_FALSE(instrument_delegate.WasOnInstrumentDetailsErrorCalled());
 }
 
 }  // namespace payments